I am the manager at a small computer repair shop and a cotumer has brought me a mac ibook g4. I run linux and we mostly work on windows machines. This is our first mac...I'm at a loss! It boots to the gray apple screen and the spinning gears turn and it freezes there. The costumer has no disks of any kind. I tired running sfck and this did not fix the problem. Every where I read online talks about restore disks, any where I can get those? Like I said, I'm at a loss any and all help would be much appreciated!!